Search Blackhawks collectible isn't hockey's first puck hunt

This isn't the first important puck that has gone missing after a hockey official picked it up. Some have turned up. Others, like Patrick Kane's Stanley Cup winner last year, remain unaccounted for.

Sidney Crosby's gold-medal-winning puck from Canada's overtime victory over the United States in the 2010 Olympic Winter Games in Vancouver disappeared after a linesman fished it out of the net. It eventually ended up at the International Ice Hockey Federation in Switzerland before being handed over to the Hockey Hall of Fame in Toronto.

And when the Los Angeles Kings' Wayne Gretzky broke Gordie Howe's all-time NHL scoring record on Oct. 15, 1989, linesman Swede Knox retrieved the puck and gave it to a timekeeper, who held on to it. That puck, too, eventually made its way to the Hall of Fame.

Paul Henderson's winner for Canada against the Soviet Union in the 1972 Summit Series in Moscow has not been found, though some believe it to be in the possession of a player on the Canadian team.

Fourteen Stanley Cup Finals have ended with a goal in overtime in addition to the Blackhawks' victory in 2010. Just one of those game-winning pucks sits at the Hall of Fame: the one from 1951.